Stoichiometry : PrecipYield (3 Variations)
In a laboratory experiment to determine accurately the amount of barium in solution, aqueous sulfuric acid was added to the solution to precipitate barium sulfate, which was then filtered and weighed. In this experiment it is MOST important that ...

Assessing the Effect of Web-Based Learning Tools on Student Understanding of Stoichiometry Using Knowledge Space TheoryRamesh D. Arasasingham, Mare Taagepera, Frank Potter, Ingrid Martorell, and Stacy LonjersThis paper reports a comparative study using knowledge space theory (KST) to assess the impact of a Web-based instructional software program on students' understanding of the concept of stoichiometry. The software program called Mastering Chemistry Web (MCWeb) allows students to practice problems that emphasize the development of molecular-level conceptualization and visualization, analytical reasoning, and proportional reasoning, as well as learning to recognize and relate different representations in chemistry. The experimental design compared students in two sections taught by the same instructor. One section used the MCWeb instructional software as homework (MCWeb group) while the other section used text-based homework (non-MCWeb group, control). Arasasingham, Ramesh D.; Taagepera, Mare; Potter, Frank; Martorell, Ingrid; Lonjers, Stacy. J. Chem. Educ.2005, 82, 1251.

Stoichiometry |

Student-Centered Learning

How to Say How Much: Amounts and StoichiometryAddison AultPictorial representation of the ways by which chemists describe an amount of material, and a systematic way to create a visual representation or "map" for solving stoichiometry problems.Ault, Addison. J. Chem. Educ.2001, 78, 1347.

Stoichiometry

A Closer Look at the Addition of Equations and ReactionsDamon DiementeChemists occasionally find it convenient or even necessary to express an overall reaction as the sum of two or more component reactions. A close examination, however, reveals that the resemblance between chemical algebraic equations is entirely superficial, and that the real meaning of addition in chemical equations is subtle and varies from case to case. In high-school courses, students are likely to encounter the addition of equations in thermochemistry, in electrochemistry, and in kinetics. Diemente, Damon. J. Chem. Educ.1998, 75, 319.